Table 3.

Qualitative changes observed in ultrasound scores after praziquantel treatment

	Improved (%)	Unchanged (%)	Worsened (%)	Total* (%)
Cases
Combined upper tract score	9 (12)	67 (87)	1 (1)	77 (100)
Combined lower tract score	62 (81)	14 (18)	1 (1)	77 (100)
Global score	71 (92)	5 (6)	1 (1)	77 (100)
Controls
Combined upper tract score	0† (0)	76 (99)	1 (1)	77 (100)
Combined lower tract score	2‡ (3)	74 (96)	1 (1)	77 (100)
Global score	2‡ (3)	73 (95)	2 (3)	77 (100)

^*Distribution of posttreatment changes was significantly different between cases and controls.

^†P < 0.01.

^‡P < 0.001, by Mann–Whitney U test.